Stitching-machine



C. E. MYERS.

STITCHING MACHINE.

APPLICATION FILED runs n. 1918.

Patented Apr. 19, 1921.

4 SHEETS-SHEET 1- C. E. MYERS.

STITCHING MACHINE.

APPLICATION FILED JUNE I7 C. E. MYERS. smcmwe MACHLNE. APPLICAUON FILED JUNE 17, I918- Patented Apr. 19, 1921.

4 SHEETSSHEET 3- C. E. MYERS. smcmwe MACHINE. A'PPLIGATION FIL-ED JUNE 1?, 1918. I

Patented Apr. 19, 1921.

4 SHEETS-SHEE T 4.

CHARLES E. MYERS, on T. oUIsIaISsoIIEI, ASSIGNOR, BY ivIEsNE ASSIGNMENTS To ACME LOCK STIroII SEWING MACHINE C01VIPANY,.OF ST. LOUIS, MISSOURI A a PORATION OF MISSOURI.

. STITCHING-MAGHINE.

Specification of LettersPatent. Patented Apr. 19, 1921 Application filed June 17, 1918. Serial No. 240,291.

T 0 all 10 710m it may concern:

Be it known that 1, CHARLES E. MYERS, a citizen ofthe United States of America, and. a resident of the city of St. Louis and tate of Missouri,have invented certain new and useful Improvements in Stitching-Vlachines, of which the following is a speci- V fication.

The main object of this invention is to provide an improved stitching head in a sewing machine for leather goods, such as shoes, harness and the like, in which an improved manner of stitching is obtained.

Another object of the invention is to provide an improved stitching machine whereby an improved lock stitch is obtained in which the interlacing junctures of the threads are drawn into the awlopening in the materiahthereby preventing the interlacing junctures fromexposure and henceforth protecting them from wear.

A further object of the invention is to provide improved means in a stitching machine whereby the locking thread forming part of the improved lock Stitch, after being interlacingly engaged, is severed and pulled into the awl puncture thereby preventing the locking thread from being pulled out of lnterlacing engagement with the loop threads.

Other and further objects will appear in the specification and be specifically pointed out in'the appended claims, reference being had to the accompanying drawings exempli fying the invention, and in which- Figure 1 is a side elevation of'this improved stitching machine, a portion thereof being broken away so as to disclose a portion of the stitching head. I

Fig. 2 is a plan view of Fig. 1, portions thereof being shown in section.

Fig. 3 is a fragmentary side elevation, partly in section, taken approximately on the line III-I1I of Fig. 2.

Fig. 4: is a front elevation taken in the direction of the arrow 1 (Fig. 3). a I

Fig. 5 isanenlarged fragmentary vertical section taken approximately on the line -v-v of Fig. 4.

Fig. 6 is an enlarged vertical section taken on the line VIP-VI of Fig. 5.

Fig. 7 is a vertical section taken on the line VII'VII of Fig. 1. F g. 8 is a side elevation of the needle carrier. I

9 is a side elevation of the awl carrier. 7

Fi 10 is a vertical section taken on the line X of Fig. 1.

Fig. 11 is a horizontal section takenon the line XIXI of Fig. 10. i

Fig. 12 is an enlarged vertical Section through the needle and a portion of needle CflIIlel.

Fig. 13 is an enlarged. fragmentary view showing thefirst operation of the needle through the awl puncture made in a portion of a sole, and in which a needle thread loop has been made. I

Fig. 141 is an enlargedfragmentary view smnlar to Fig. 13 showing the next operatlon relating to the loop forming bar in which a locking loop has been inserted through the needle thread'loop. l f

Fig. 15 is :an enlarged view similar to F1g. 14:, but showingthe single strand lock- :llng thread inserted through the locking Fig. 16 shows the needle thread loop in a position of being drawn upwardly.

Fig. 1? shows the locking loop in a rearwardly drawn position against the single strand locking thread.

F 18 is an inverted view of Fig. 16..

.Fig. 19 shows the intersecting loops and the single strand locking thread drawn into the awl puncture, which is the last operzontally arranged power shaft 5. Secured to the front wall 6 of the frame 2 is a forwardly extending supporting member 7 which comprises a part of the .sititching head, and formed in said member 7 are a pair of circular seating recesses 8 and 9 respectively. Mounted in the recess 8 is a segmental gear 10 which is secured to a rod 1 1 which leads from the eccentric strap 15 0f the-eccentric 16 which is secured to the shaft 5.

Located in the recess 9 of the supporting member 7 is a segmental gear 17 which is in mesh with the segmental gear 10, said gear 17 comprising the carrier for the needle 18, said needle being secured to the carrier by the clamping plate 19 and screws 20.

The carrier 17 has a hub 21 formed thereon which is adapted to nest in a bearing. 22 which is formedon the wall 23 of the recess 9, and concentrically arranged in said hub is an opening 24 which is for the reception of and to hold a screw. 25, the head of said screw being seated in the enlarged bore 26 which is formed in the hub 21.

Located adjacent oneside of the needle carrier 17 is an awl carrier 27 which is ar-' ranged concentric with said needle carrier and having a hub 28 formed on one side thereof which is seated in the enlarged bore 26 of the needle carrier. Extending from one side of the awl carrier 27 are a plurality l lever extending through a slot 51 which is of guiding pins 29, said pins being seated in respective openings 30 which are formed in the needle carrier 17.

Formed on the awl carrler 27 is an underlapping portion 31 which is adapted to underlap the lower portion of the needle carrier 17, and removably secured to said un derlapping portion 31 by the clamping plate 32 and screws 33 is an awl 34.

Extending from the awl carrier 27 on the side opposite the hub 28 is a grooved collar 35, and engaging the groove of said collar.

is a bifurcated end 36 of a lever 37, said shown at a0 and carrying a friction roller 41. Formed: in each of the ledges 39 is a slot 42, said slots providing means for adjustin the pivot 38 of the lever 37.

secured to the power shaft 5 beneath the upturned end 40 of the lever 37 is a cam wheel 43 having a shifting raceway 4 1 formed in its periphery in which is mounted the friction roller 41 of said lever.

Secured to the power shaft 5 between the walls 3 of the frame 2 is a cam wheel 15 hav- .ing a shifting race-way 16 and depending in said race-way is a friction roller 4:7 which is secured to one end of a lever 18, said lever being pivoted at 49 to the horizontal portion 50 of the frame 2, the opposite end of said formed in the front wall 6 of said frame 2.

Secured to the extending end of the lever 48 is a swivel block 52 which horizontally sup ports a loop forming bar 53, the extending end of said bar being slidably mounted in an opening 5 1 which is'formed in the wall 23 of the supporting member 7, there being a recess 55 formed in said wall 23 forming part of the opening 541, said bar 53having a, thread engaging notch 56 formed in its forward end.

Depending from the wall 23 beneath the needle carrier 17 is a supporting extension 57 having a pair of spaced apart vertically arranged guides 58, one of which (58) is adjustable by means of adjusting screws 58*, and mountedbetween said guides is a combined cutting and feeding block 59. Formed on the block 59 is a circular portion 60 having a thread-feeding groove 61 in its under face, the upper end of said portion 60 terminating at 62 beneath the shoe rest 63 which is secured to the front edge of the wall 23. Depending from the shoe rest 63 is a thread-guiding portion 6 1 having a thread- 'uidin recess 65 formed therein ad'acent. 2D '7 to the block 59' is a pin 67 and mounted on said pin is one endof a lever 68 whichis pivoted at 69 to the frame 2, the opposite end of said lever bearing a friction roller 70 which is engaged in a race way 71, said race way being formed in one side of a cam disk 72 which is secured to the power shaft 5 between the cam wheel 13 and one of the walls 3 of the frame 2.

Formed on the opposite side of said'disk 72 is a race way 7 3 and mounted in said race way is a friction roller 74- which is secured to one end of a lever 75, said lever being mounted on the pivot 69. The opposite end of said lever engages one end of a feed lever 76 which is pivoted at 77 to the block 59, the opposite end of "said lever 76 carrying a thread-feeding shoe 78, the feeding end of i said shoe bearing against the under side of the circular portion 60. v

Formed in the shoe rest 631s an elongated opening 79 having a Vshaped end 80, said opening being for the reception of the needle 18. Formed in the outer periphery of the needle 18 is a thread-feeding groove 81 which leads to the needle eye 82, said groove and eye being for the reception of the continuous needle-looping thread 83 which leads from the take-up lever 84, said take-up lever being pivotally mounted at 85 to the brackets 86 which are mounted on top of the walls 3.

Secured to one end of said take-up lever 84 is a friction roller 87 which is mounted in a raceway 88 formed in one side of a cam cam disk 39 which is secured to the shaft 5 is a race way 90, and mounted in said race way 90 is a friction roller 91 which isnsecured to one end of athread-holdinglever 92 pivotedat 93 to the brackets 194:. The thread-holding lever operates on the needlelooping thread 83-which is fed from the spool.95 mounted on the bracketn96 said bracket being located at the rear w of:the frame2. V

Mounted between the rear: legs 97 ofthe frame 2 is a spool'ofi thread 98 fromwhich is fed a continuous locking-loop thread 99,

, said thread 99 being fed intoa wax ipotil00,

where it is entrainedthroughthe wax in said pot by a guiding lever 101, said thread 99 upon leaving the wax pot passingithrough a wiper 102 and then is guidedby theroller l 103 and is engagedby thefriction lever'104: which holds said thread-againstthe eunder frame 2 adjacent the legs 9 7 tion 6 1. 1

In the operation of this improved stitcheing machine when power is applied to the power wheel 107 which is secured to the shaft 5 reciprocatory motionpis. applied to the eccentric rod 14, thereby rocking the crank 13 and stub shaft 11 and imparting a rocking movement to the segmental gear 10, the needle carrier '17 and the awl carrier 27 which is slidingly securedto the needle carrier. The awl 34eon its upward movement passes through the opening 79 of the shoe rest, 63 and makes a punctureinithe sole of the shoe to be sewn which is mounted on theshoerest. While the'awl is engaged in the sole an inward movement is applied to the bifurcated end 36 of the lever 37 by the cam wheel 43, thereby causing the awl carrier and awl carried thereby to be moved toward an alining position-with theneedle 18. Theawl 34: isretractedfrom the punc-' ture in the sole after the awl puncture of the sole has been left in an alining position :ready for the reception of the needle '18 as the awl movesaway from the awlpuncture. The needlelS onits descent and passage through the awl puncturein the sole, designated as 108 in Fig. 13, will carry a portion of the continuous needle-looping thread through the puncture, said needle passing through the opening 79 of theshoev rest 63, and as the needle is backed offon its return movement a loop 109-is formed ;in the needle-looping thread 83 on .the :inner curve 'of the needle and-Yon the under side .of the shoe g rest. and in horizontally alining position with the loop-forming bar opening 54. As the needle 18 is :being backed off or -retractedl upwardly the ex- .-.tending end of the lever 48 "bearing the SWlVCGlLblOCkfiQ il-IldalOOP-fOI'IIllIJQ bar 53 is ,beingmoved inwardly by actuation of the cam .-wheel 4:5, and since the extending end of the continuous-ilocking loop thread 99 is first :extended upwardly throughthe V- shaped end 80 of the opening 79 of the shoe rest 63,v the notch 56 of the loop-forming bar 53 inritshorizontal inward movement will: engage the vertical extending portion of" the thread 99 andiloop the same, said bar 53. on its inward movement forcing the 2100p 110 (as shown clearly in Fig. 1e)

'1 through theneedle thread loop 109.

Immediately after the formation of the .1oop1110 and as the bar'53 is moving rearwardly by actuation of the lever 418, and ca m'fwheel 45,=theforward end of thelever '75is forced downwardly thereby-actuating against: the inner face of thecircular portionw=.60,;thereby pressing against the lock thread 106 which is engaged in. the thread ;-feeding groove 61 ofthe circular portion 60 v and feeding the extending end of said look- ;ing thread 106 upwardly andoutwardly from the recess 65 of the :thread: guiding portion 64: and inserting the extending end I of said thread 106 in the'looking-loop thread :110 and'outside' ofthe needle loop thread 109 (see Fig. .15)

Immediately afterthe extending end of.

the'lock'thread 106 has been fed into the. lockingloop thread 110, an upward move-' ment is appliedto'theforward end ofthe 1ever 68 by'the-cam disk 72,: said upward 'movement of theilever 68 carrying the block 59 upwardly and the knife 66 carried there-.1 by will engage" the extending portion, of: the

lockfthread 106and' sever it-against the'cutting-edge 111, thereby forming a lock bar 112 as shown in Fig. 15, relative to, the locking loop 110..

Since the needle 18 was the first to .oper

' ate -relative1 toforming the needleloop 109 said loop109-isthe firstjin order to be retracted into ,theawl puncture 108 in which the lower endof the loop will be-drawn At this point the lockingloop; 110 is drawn rearwardly, thereby firmly holding the lock "bar 112 -formed'by the cut-out portion of the lock; thread 106 against theglowerr end of the needleloop 109, as shown in Fig. .17. o

'At thispointthe loops 109 and 110 and the lockfbar 112m drawn upwardlyrinto the iawl puncture 108 approximately midway rthereoih as shown in Fig, 19,1 said loops and .-the feed "lever76 and causing the thread :feeding shoe 78 to4be moved'upwardly against the locking loop 110 (see Fig,- 16).

Joel: bar being drawn taut relative to each other andsecurely: nested in the awlpuncture in which the interlacing junctures thereof are protected against exposure and consequently wear.

" It is obvious that aftereach awl puncture made by theawl 343 in thesole of a shoe or other article to be stitched a repetition of loop forming and lock barinterlacingand threading relative to sewing follow. in

the succeeding operations.

Attention is called to the awl carr1er'27 which is slidinglysecured to the needle carrier 17 in which the pins 29 secured to the ings 30 formed in the needle carrier, the

engagementof saidpins with said openings providing for reciprocatory movement beawl carrier slidingly engage respective opening applied to the awl carrier from the needle carrier and in addition thereto the sliding engagement of said pins with the needle carrier along with the hub 28 of the awl carrier provides for. a true and positive sliding relation of the awlcarrler, as the awl 34 is moved to and from an alining traveling positionrelative to the needle 18 of the needle carrier which provides for the carthrown back jposition,whereas when a shoe J ing rfoot respectively, then the "pressing member 113 is pulled over until the foot thereofengages against the upper portion of the sole. Then the binding screw 117 is set, thereby holding the pressingmemberu and foot, inaset position relative to the rying over of the awl puncture made in the material to an alining position relative to the needle.

in which the hub 21 of the needle carrier the shoe rest 63 and formed in said foot of said shoe rest is an opening 118 through which the needle 18is adapted to recipro- In the operation ofthe pressing member 113 when not in use the foot 114 is in a to be sewn relative to the sole is mounted on the shoe rest and "placed in proper pol sition relativeto the alinem'ent ofthe openings 7 9 and 118ofthe shoe rest63 and pressy shoe rest. 63, which "position said foot and shoe-rest. provide a guiding member for the shoe as the awl 34: of the awl carrier ters Patent ofthe United 1 1. In a stitching machine, an oscillating rofsaid loops.

In order to hold; the shoe in proper po-- sition on the shoe rest 63 .a pressing member 113 having afoot 114 is provided, there being a bearing 115 formed in ing member whichis adapted-to be rotatably mounted on .the hub 116 which is formed on v the outside a said pressof the bearing 22 feeds over toward an alining position with the needle.

.What I claim and desire to secure by Let- States, is:

are shaped, needle,- a reciprocating threadcarrying bar, said needle and said bar each adapted to form a thread loop, a pushing element adapted to feed a locking thread into one of said loops, and means for sev-.

fering said locking thread.

. 2. In astitchingmachine, an oscillating are shaped needle, a reciprocating threadcarrying bar; moving in a. plane perpendicular to the plane of said needle, said needle and'said bar each adapted to form a thread loop, a pushing element adapted to feed a docking thread into one of said loops, and

means :for severing said locking thread after a portion thereof has been inserted in one 3. In a stitching machine, an oscillating needle carrier having an arcshaped needle,

an awl carrier mounted to oscillate on the same axis as said needle carrier and carrying an opposed arc shaped awl normally out of'line with said needle, said needle carrier and said awl carrier having the one a-recess and theother apin slidably engaging'said recess to cause :said carriersto rotate in unison, means for. oscillating said needle carrier to cause said awl and said needle, carrier to successively enter thework, and means fOI'lIlOVlIlgSLld .awl carrler to bring the awl in line with the needle after the awl has penetrated the work.

4Q In astitching machine, a head mmher having a bearing recess, a gearsegment having a hollow-hub journaled in said recess and carrying an are shaped needle, a segmental awl carrier having a hub slidably *mounted in said hollow hub-,means for locking-said carrieragainst independent rotation, means engaging said gear segment for osclllating the same, and means for slid ng said awl carrier.

I 5. In astitching machine, a'reciprocating loop formingneedle, a reciprocating thread carrying bar adapted to spread the loop formed b'ythe needle and lay a loop therein, and a pushing element adapted to feed a lockingthread into said second loop, and

means for severing said locking thread.

6. Ina stitching machine, the combination withloop forming means,- of means for inserting a locking thread therein comprising a curved thread guide, a rocking lever, and

,a yielding thread feeding shoerarried by saidleve p 1 1 7. In a stitching machine, the combination with the work support and loop forming means, of means for pushing a locking thread through the loop, comprislng a "curved thread guide, a rockinglever, a second lever pivoted tosaid first named lever.

and having a curved face cooperating with said guide, and a spring acting on said lever.

8. In a stitching machine,the combination 5 with the work support and loop forming means, of a means for inserting and severing a locking thread comprising a curved thread guide, a reciprocating slide carrying a cutter, a lever pivoted to said slide and carrying a pushing shoe cooperating with said guide, means for rocking said lever, and means for reciprocating said slide.

CHARLES E. MYERS. 

